On Jan. 1, the country’s second deconstruction ordinance went into effect in Milwaukee. In short, the ordinance “provides deconstruction requirements for the removal of Milwaukee’s older and more historic primary dwelling structures.” Deconstruction, in contrast to demolition, is the process of systematically dismantling a structure in an environmentally, socially and economically responsible manner, aiming to maximize the recovery of materials for reuse and recycling. The ordinance targets primary-dwelling structures built in 1929 or earlier. This reason for this specification? The likelihood that those structures will contain old-growth lumber and other valuable building materials.